I'm sick and tired, so I'll just copy and paste a comment I made on reddit:
I am also "deaf to lyrics" and have a similarly broad taste in music.
I found this article perfectly describes the difference between my wife and I. She loves country music because she listens to the lyrics, where as I can't stand it (generalizing of course) because 90% of it is musically the same very plain musical structure and instrument combinations.
I grew up clasically trained in music where I was a percussionist in a large orchestra at a private music school. I also played in a jazz band and in the pit at musicals.
I find myself having to be careful when the subject of music comes up in a conversation (primarily in a professional setting) because some of the music I listen to can have hateful or nonsensical lyrics. I love System of a Down, NIN, and Mars Volta, for example.